inclusion criteria: (1) age ≥ 18 years. (2) clinically diagnosed patients with new type of coronavirus pneumonia include: on the basis of meeting the criteria for suspected cases, one of the following pathogenic evidence: ① real-time fluorescent rt-pcr of respiratory specimens or blood specimens for detection of new coronavirus nucleic acid; respiratory or blood specimens are genetically sequenced and highly homologous to known new coronaviruses. (3) the time interval between the suspected neocoronary pneumonia pneumonia case and the random enrollment is determined within 4 days to 7 days according to the history symptoms and chest ct imaging. cough, diarrhea, or other related symptoms can be used. the imaging changes are mainly based on chest ct.

inclusion criteria: (1) age ≥ 18 years. (2) clinically diagnosed patients with new type of coronavirus pneumonia include: on the basis of meeting the criteria for suspected cases, one of the following pathogenic evidence: ① real-time fluorescent rt-pcr of respiratory specimens or blood specimens for detection of new coronavirus nucleic acid; respiratory or blood specimens are genetically sequenced and highly homologous to known new coronaviruses. (3) the time interval between the suspected neocoronary pneumonia pneumonia case and the random enrollment is determined within 4 days to 7 days according to the history symptoms and chest ct imaging. cough, diarrhea, or other related symptoms can be used. the imaging changes are mainly based on chest ct.